Refrigerating device



Dec. 10, 1935. L. c. SMITH 2,023,749

REFRGERATING DEVICE Filed April 10, 1934 Faye'.

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(It omeg Patented Dec. l0, 1935 UNITED STATES yPATENT OFFICE A 2,023,749 l f nEFnrGEnATlNG DEVICE Lawrence C. VSmith, Buialo, N. Y., assignor to Fedders Manufacturing Company, Inc., Buffalo, N. Y.

Application April "10,1934, serial No. 719,866

` 4 claims. (ol. s2-126) The invention relates to refrigerating devices which are adapted for use in the cooling of air.

The invention'is directed to a means for manifolding lthe extremely large coilsof this type,

5- whereby liquid refrigerant is supplied at a uniform rate to the coils and expanded'refrigerant lis withdrawn at an equally uniform rate from all portions of the device. There is also incorporated in the manifold and* coilstructure a gravitational ilow characteristic which provides against the trapping of oil under any operating condition. 'Ihese features, together with a novelY imposed relation to form a vertical structure.

Each section includes a `plurality of horizontal rows I I of straight tubing I2, the tubing in each row being connected in series by horizontal loops I3, and the rows being connected to each other by a vertical loop I4 which thus cooperates to form a continuous refrigerant passage'in the secy tion. Vertical fins I5 cooperate to retain the tubing in assembled relation, and they are formed with apertures through which the tubing is engaged and secured.

It is proposed that, one or more sections may constitute a unit I6 to receive refrigerant and exhaust it in an expanded state through indiy vidual supply and output means with but a o small frictional loss. p

As herein illustrated, each unit I6 comprises two sections I0, connected in series by coupling the free extremities of adjacent rows of tubing with a vertical loop II. The remaining free ex- 45 tremities of the unit, thus formed, are denoted as the upper or input end Island the loweror output end I9. v

A horizontally disposed input header 2|, oomformed of-a large tube whichl is disposed vertically, 'adjacent the device. Pipes 32 are secured to the header 3| and they are each connected to an output end I9 by a union 33.

Various structural means may be employed to retain the units in -a rigid assembly. As herein shown, the assembly means comprises a number of heavy gauge steel plates 35 andA 36 arranged on opposed faces ofthe units. The plates are slotted as indicated by the numerals 36, 31, 10

and `36 to engage over the various loops of the units and they are secured to the tubing I2 by brazing. The extremities of the plates 35 and 36 are formed with protective flanges 39 and 40 which extend over the `exposed corner fins 15 and thus prevent their mutilation. e

In operation the device may be inserted vertically in a wind tunnel (not shown) with the iins disposed in alignment with the air stream whereby the air may be cooled and the fins may be 20 gravitationally drained of any condensates de.

' posited thereon. The device may be connected inv numerous types of refrigeration systems, for example. when used with a dry system of evaporation, the opposite open ends of the input 25 header 2| may be connected to expansion valves 4| and 42 respectively, thus providing a dual -input and the resultant uniform feeding` of re-` frigerant to the input pipes. Similarly, the'ends of the output header 3| may be connected to dual 3 0 output conduits 43 wherein the suction reaction on the output pipes may be substantially equalized.

Special attention is directed to the method of connecting the tubing, whereby the gravitational 35 drainage of each unit of oil volumes carried with the refrigerant is assured. This conception is also present in the disposalof both the input and output pipes, and it provides a device which is entirely free of oil traps. f 40 While the preferred embodiment of .the invention has been, specifically described, it is to be understood that the invention is not limited to the illustrated embodiment, but may be other'.-

wise embodied,within the scope of the following 45 l claims.

I claim: f 1.' A refrigerating device comprising a pluralityof superimposed units adapted to be mountedvertically, each unit comprising a plurality of horizontal rows of tubing, loops connecting the tubes in each row in series, loops connecting adjacent rows in series to provide a. continuous refrigerant passage in the unit, and vertically disposed ilns secured to the tubes, an input header 2 disposed above 4the device and provided with a.

plurality of depending pipes, each pipe being connected to the uppermost free tubing extremity of a unit, and an output header disposed vertically adjacent the device and provided with a plurality oi horizontally disposed pipes, each. pipe being connected to the lower free tubing extremity ot..

input conduit communicating with each end thereof, and an output header formed with a plurality oi output pipes, each output pipe com-- municating with the remaining'free extremity of each unit. t I 3. A retrigerating device comprising a plurality of superimposed units, each unit compris- 'ing a plurality of rows of tubing and loops connecting the tubingy to form a continuous refrigerant. passage in each unit, input and output headers comprising open tubes formed with radial pipes, each passage having its free extremities connected to an input pipe and an output pipe respectively, refrigerant supply conduits secured to each extremity of the input header, and suction conduits secured to each extremity oi the output header.

4. A reirigerating device comprising a plurality oi' superimposed units adapted to be .mounted vertically, each vunit comprising a pluralityof sections formed oi.' a plurality of horizontal rows of tubing, loops connecting the tubing in series, and vertical iins formed with aper-"- tures for receiving the tubing in each section, 15

loops connecting the tubing in adJacent sections of each unit in series to i'orm a continuous refrigerant passage in each unit, bars secured to the opposite extremities of the tubing `and structurally connecting the units, input and output .oV

headers each formedy with a plurality ot pipes, and means connecting the opposite ends oi each passage to an input pipe and an output pipe res'pectively.

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